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In a biprism experiment , fringe width i...

In a biprism experiment , fringe width is measured as 0.4 mm . When the eyepiece is moved away from the biprism through 30 cm, the fringe width increase by 50% if the two virtual soruces are 0.6 mm apart, find the wavelength of light used.

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SL ARORA-WAVE OPTICS-Based on Intensity Distribution in interference pattern
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